I had seen villain donk bet only once before in 248 hands. I dont see value in raising as it would have to be r/f. The turn is a blank so I call again. On this river I obviously fold. What if the river was a blank and he had shoved?

I'd even consider making a crying fold on the turn than Calling without any information. If I am calling the turn then it means I am also calling the river, the Q is also a blank for us but rather good card for him to 3rd barrel.